/* 提示框样式 */
#hint{
    padding: 0 40px;
    position: fixed;
    left: 50%;
    top: 20%;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
    min-width: 200px;
    color: #fff;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.7);
    transition: 0.6s all;
    transform: translate(-50%) scale(0);
    z-index: 999;

}